#/bin/bash
function s1_hello(){
 echo "hello, world!";
}
function s2_tell_who_i_am(){
 whoami;
} 
function s3_which_distro_do_i_use(){
  if [[ -f /etc/os-release ]];then
  source /etc/os-realease
  echo "NAME=\"$NAME\""
  elif [[ -f /etc/lsb-release ]];then
  . /etc/lsb-release
  echo "NAME=\"$DISTRIB_ID\""
 else
   cat /etc/issue | head -n 1 | sed 's/\\n//g' | sed 's/\\r//g' | sed 's/^\\s*//g'
  fi
  }
function s4_view_my_cpu_arch(){
uname -m;
  }
function s5_show_first_scsi_disk_size(){
 lsblk -1 | \grep disk | \grep '^sda' | awk '/^sda/ {sub(/G$/,"",$4); print $4}'
 }

function s6_show_main_memory_size_in_megabytes(){
 free -m | grep "Mem:" | awk '{print $2}'
}

